First OVA: Makoto and Nagisa try to deduce how much water it takes for Haruka to want to take off his clothes and dive into it. Later, the three think up ideas on how to recruit new members.
Third OVA. Nagisa, Haruka and Makoto help Rei pick out a swimsuit. Rin watches the swim club kick upside down. The swim club is curious about Haruka's laughter.